The grid
Pitch on one axis, time on the other. Stretch a note, resize it, or shove it onto the next beat.
Piano roll
MIDI Editor
Load a .mid, move notes on the grid, export when it sounds right. The draft lives in this tab.
MIDI EditorLoading editor
MIDI editor
A note grid in this tab
This online MIDI editor is a note grid in your browser. Drag pitches, change how hard they hit, pick a sound, export a .mid. Closing the tab does not send anything to us.
Editing tools
An online piano roll when you do not want to boot a DAW
Move notes. Hear them. Save a standard MIDI file. That is the whole job.
Sound and speed
Change the patch, the BPM, pan, and level without leaving the browser or installing a sound editor.
A copy that survives the tab
The browser can remember this session. Export a .mid if you need the file elsewhere.
Use cases
When to open this online MIDI editor
After Audio to MIDI, or when a .mid needs a look before it hits a DAW.
After a conversion
Kill ghost notes and park the phrase on the downbeat before the file reaches your project.
Before a DAW session
Hear the part on a different patch, then drop a cleaner file into the project.
Learning the grid
See a melody as blocks instead of a waveform. No install, no account, no project file.
A piano roll online, nothing to install
Open this MIDI editor online when you only need a quick pass. The grid loads in the browser and the file never has to leave your machine.
Open, nudge, export
Get a .mid in, put notes where they belong, take a .mid out.
- 01
Load MIDI
Open a file from disk, or arrive here from an Audio to MIDI conversion.
- 02
Nudge the grid
Drag, resize, change velocity, set BPM. Listen after each move.
- 03
Export a .mid
The tab can remember the session. Download when the file has to travel.
Notes, not audio
You are editing instructions: pitch, when it starts, how long, how hard, how fast, which sound. The original recording is untouched.
After Audio to MIDI
Delete extras, drop octaves that jumped, and snap the phrase to the click.
A new sound without a new take
Swap the patch and the tempo. The hummed line still exists as audio on your machine; this file is only the notes.
Open a file from anywhere
Load a .mid exported from a DAW, a notation app, or the Audio to MIDI converter. The editor reads the same standard format either way.
Before you edit
Is this MIDI editor free?
Yes. Moving notes in this online MIDI editor does not spend credits and needs no account.
Does autosave upload my project?
No. It writes to localStorage in this browser. We never get the file.
Can I edit MIDI converted from audio?
Yes. Convert first, then send the result here and clean the grid.
Can I edit a MIDI file without installing software?
That is what this page is for. Open a .mid from disk, move the notes in this MIDI editor online, and export when it plays clean.
Does it work as an online piano roll?
Yes. The grid shows pitch against time, the same way a piano roll does. Drag, resize, and set velocity directly on the notes.
What if localStorage is off?
Editing still works. Download the .mid before you close the tab, because the session will not be remembered.
Put the notes on a grid
Load a .mid, drag what is wrong, export when it plays clean. No install and no account.
Open MIDI editor